You are using very poor logic. Let me help.
1. You are not clearly defining your terms and your using them weirdly. Are you considering thought processes as material or immaterial? Seeing as how our brains are material and thoughts happen in our brain, you can say that logic is material because it is happening in our physical brains. However, in a casual conversations a person usually isn't going to say a thought is material. Is a thought a physical thing? Even though the thoughts are inside our brains and so physical things, the ideas them self are not really material. There isn't a 1+1=2 particle that floats in space as a physical object.
2. There is nothing saying immaterial things have no restrictions. If we are using the idea that thoughts and ideas are immaterial, then that makes math immaterial. Math clearly has set rules and restrictions. There is no logical reason to think immaterial things don't have limits and restrictions. You basically just pulled that out of your ass.
That is totally incorrect. I can absolutely prove that your statement is 100% wrong. You just said that if two different mathematical questions have the same answer, that proves it is not logical. That is faulty.
3+2=5
6-1=5
That is two separate mathematical equations that gives the same result. You are wrong. There is absolutely no reason what so ever, that multiple equations can't equal the same thing. You just pulled that totally out of your ass. Now I think it is time for you to admit you are wrong, or are you going to argue that 3+2 isn't 5? Or that 6-1 isn't also 5?